$search contains backslashes that should not be interpreted as special characters. Use \Q to quote the special characters: 
if (not $string =~ s/\Q$search/$replace/) {

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Note that / can be used as the delimiter, since neither the pattern nor the replacement contain literal slashes.

لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Regex match inside quotes doesn't work by choroba
in thread Regex match inside quotes doesn't work by tobias_hofer

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